Yes, while exploring, the split screen hides the surrounding area. If both of you like to stay close to one another, then both screens become redundant with visual info and thus confusing. Also, during combat, the split screen doesn’t give nearly as good a layout as DOS2 did. Basically load your game with just one controller, single player. That’s how you could make it look but with both players dickin’ around on the same screen. You then had the option to split off and run wherever you want, auto-engaging the split screen. One player could start a battle far away from the other player, and then once that other player ran over and joined in the battle, the screen would auto-merge again, and you could see the entire battlefield, without any visual redundancies.
My apologies if you played DOS already and I’m explaining the obvious.